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$H_0^1(Omega)hookrightarrow L^4(Omega)$?


What is the Sobolev Lemma?Differences between $-Delta: H_0^1(Omega)to H^-1(Omega)$ and $-Delta: H^2(Omega)cap H_0^1(Omega)to L^2(Omega)$functions in $H_0^1(Omega) cap C(overlineOmega)$ are zero on the boundaryReference request: The compactness and compact embedding in Besov Space?$u in W^2,2(Omega)$ implies $Delta_p u in L^q(Omega)$ for some $q>1$?Problem to understand Sobolev imbedding.Inequality in $W^1,infty(Omega)$Show that $ C^1(overlineOmega) hookrightarrow C^0,alpha(overlineOmega)$ is compact.Compact embedding of $W^k,p(Omega)$ into $W^k-1,p*(Omega)$, where $p^*$ is the Sobolev conjugateEquivalence of norms in the space $H_Delta(Omega)$













1












$begingroup$


In a paper I see that the authors used $H_0^1(Omega)hookrightarrow L^4(Omega)$ where $Omega$ is an open bounded domain in $mathbbR^N$ with smooth boundary. I think that this imbedding holds only for those $N$ which satisfy $4leq 2^star$($2^star=frac2NN-2$) i.e. when $Omega$ is in $mathbbR^3$ or $mathbbR^4$. How we can show this imbedding for higher dimensions?










share|cite|improve this question











$endgroup$







  • 1




    $begingroup$
    You are right, this is only true for $Nle 4$.
    $endgroup$
    – daw
    Mar 16 at 12:00










  • $begingroup$
    @daw Thank you very much. I do think so.
    $endgroup$
    – Albert
    Mar 16 at 17:11















1












$begingroup$


In a paper I see that the authors used $H_0^1(Omega)hookrightarrow L^4(Omega)$ where $Omega$ is an open bounded domain in $mathbbR^N$ with smooth boundary. I think that this imbedding holds only for those $N$ which satisfy $4leq 2^star$($2^star=frac2NN-2$) i.e. when $Omega$ is in $mathbbR^3$ or $mathbbR^4$. How we can show this imbedding for higher dimensions?










share|cite|improve this question











$endgroup$







  • 1




    $begingroup$
    You are right, this is only true for $Nle 4$.
    $endgroup$
    – daw
    Mar 16 at 12:00










  • $begingroup$
    @daw Thank you very much. I do think so.
    $endgroup$
    – Albert
    Mar 16 at 17:11













1












1








1





$begingroup$


In a paper I see that the authors used $H_0^1(Omega)hookrightarrow L^4(Omega)$ where $Omega$ is an open bounded domain in $mathbbR^N$ with smooth boundary. I think that this imbedding holds only for those $N$ which satisfy $4leq 2^star$($2^star=frac2NN-2$) i.e. when $Omega$ is in $mathbbR^3$ or $mathbbR^4$. How we can show this imbedding for higher dimensions?










share|cite|improve this question











$endgroup$




In a paper I see that the authors used $H_0^1(Omega)hookrightarrow L^4(Omega)$ where $Omega$ is an open bounded domain in $mathbbR^N$ with smooth boundary. I think that this imbedding holds only for those $N$ which satisfy $4leq 2^star$($2^star=frac2NN-2$) i.e. when $Omega$ is in $mathbbR^3$ or $mathbbR^4$. How we can show this imbedding for higher dimensions?







real-analysis functional-analysis analysis pde sobolev-spaces






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Mar 17 at 6:18







Albert

















asked Mar 16 at 9:49









AlbertAlbert

739312




739312







  • 1




    $begingroup$
    You are right, this is only true for $Nle 4$.
    $endgroup$
    – daw
    Mar 16 at 12:00










  • $begingroup$
    @daw Thank you very much. I do think so.
    $endgroup$
    – Albert
    Mar 16 at 17:11












  • 1




    $begingroup$
    You are right, this is only true for $Nle 4$.
    $endgroup$
    – daw
    Mar 16 at 12:00










  • $begingroup$
    @daw Thank you very much. I do think so.
    $endgroup$
    – Albert
    Mar 16 at 17:11







1




1




$begingroup$
You are right, this is only true for $Nle 4$.
$endgroup$
– daw
Mar 16 at 12:00




$begingroup$
You are right, this is only true for $Nle 4$.
$endgroup$
– daw
Mar 16 at 12:00












$begingroup$
@daw Thank you very much. I do think so.
$endgroup$
– Albert
Mar 16 at 17:11




$begingroup$
@daw Thank you very much. I do think so.
$endgroup$
– Albert
Mar 16 at 17:11










1 Answer
1






active

oldest

votes


















1












$begingroup$

The general result is called the Sobolev embedding theorem, which states that $H_0^k$ is embedded in $L^q$ where $$frac1q=frac12-frackn$$ where $n$ is the dimension of the space. This can be generalized even further, see the Wikipedia article.






share|cite|improve this answer









$endgroup$












  • $begingroup$
    Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
    $endgroup$
    – Albert
    Mar 16 at 17:16











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1 Answer
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active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1












$begingroup$

The general result is called the Sobolev embedding theorem, which states that $H_0^k$ is embedded in $L^q$ where $$frac1q=frac12-frackn$$ where $n$ is the dimension of the space. This can be generalized even further, see the Wikipedia article.






share|cite|improve this answer









$endgroup$












  • $begingroup$
    Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
    $endgroup$
    – Albert
    Mar 16 at 17:16
















1












$begingroup$

The general result is called the Sobolev embedding theorem, which states that $H_0^k$ is embedded in $L^q$ where $$frac1q=frac12-frackn$$ where $n$ is the dimension of the space. This can be generalized even further, see the Wikipedia article.






share|cite|improve this answer









$endgroup$












  • $begingroup$
    Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
    $endgroup$
    – Albert
    Mar 16 at 17:16














1












1








1





$begingroup$

The general result is called the Sobolev embedding theorem, which states that $H_0^k$ is embedded in $L^q$ where $$frac1q=frac12-frackn$$ where $n$ is the dimension of the space. This can be generalized even further, see the Wikipedia article.






share|cite|improve this answer









$endgroup$



The general result is called the Sobolev embedding theorem, which states that $H_0^k$ is embedded in $L^q$ where $$frac1q=frac12-frackn$$ where $n$ is the dimension of the space. This can be generalized even further, see the Wikipedia article.







share|cite|improve this answer












share|cite|improve this answer



share|cite|improve this answer










answered Mar 16 at 11:41









ChrystomathChrystomath

1,783513




1,783513











  • $begingroup$
    Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
    $endgroup$
    – Albert
    Mar 16 at 17:16

















  • $begingroup$
    Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
    $endgroup$
    – Albert
    Mar 16 at 17:16
















$begingroup$
Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
$endgroup$
– Albert
Mar 16 at 17:16





$begingroup$
Thank you very much for your answer. I know the generalized form of the Sobolev imbedding. But my question is in this special case $k=1$.
$endgroup$
– Albert
Mar 16 at 17:16


















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